7th Seoul - 3rd Cycle Exam

What does the push() method do in an array?

• Adds an element to the beginning
• Adds an element to the end
• Removes the last element
• Removes the first element
• Pluto

How do you create an array in JavaScript?

• let arr = "1, 2, 3";
• let arr = [1, 2, 3];
• let arr = (1, 2, 3);
• let arr = {1, 2, 3};

Which array method removes the last element?

• pop()
• push()
• shift()
• unshift()

What does the length property return?

• Number of elements in the array
• The last element
• The first element
• The data type of the array

Which method creates a new array by calling a function on each element?

• forEach()
• map()
• filter()
• reduce()

How do you access the first element of an array named fruits?

• fruits[1]
• fruits(0)
• fruits[0]
• fruits{0}

Which method removes the first element from an array?

• pop()
• shift()
• unshift()
• push()

What will console.log(fruits.push("Orange")) return if fruits = ["Apple", "Banana"]?

• ["Apple", "Banana", "Orange"]
• ["Orange", "Apple", "Banana"]
• 3
• 2

Which method checks if every element passes a test?

• some()
• every()
• filter()
• find()

How do you create an empty array?

• let arr = {};
• let arr = [];
• let arr = ();
• let arr = "";